200 BOTANY. 



woods during the month of May, and is well distributed in the 



northeastern United 

 States. A plant is shown 

 in fig. 1 80. It has a 

 creeping underground 

 rhizome, whitish in color, 

 fleshy, and with a few 

 scales. Each spring the 

 annual flower - bearing 

 stem rises from one of 

 the buds of the rhizome, 

 and after the ripening of 

 the seeds, dies down. 

 The leaves are 

 situated a little above 

 the middle point of 

 the stem. They are 

 opposite and the num- 

 ber is two, each one 



Fig. 180. 

 Toothwort (Dentaria diphylla). 



